Bed-bottom.



H. O. ERSIN.

BED BOTTOM.

APPLICATION FILED MAY I6, 1913.

PatentedJune 20, 1916.

HAROLD O. ERSIN', F S1. PAUL, MIN'NESOTA BED-BOTTOM.

Specification of Letters Patent.

Application filed May 16, 1913. Serial N 0. 767,952.

To all whom it may concern:

Be it known that I, HAROLD O. ERSIN, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and useful Improvement in Bed-Bottoms, of which the following is a specification.

This invention relates to a bed bottom which is an improvement on the construction set forth in Patent No. 1,053,959, granted to me on the 18th day of February, 1913.

The primary object of the present invention is to provide a construction which is particularly adapted for use in connection with a link or other fabric, parts of my improvement being constructed for such cooperation in an inexpensive and effective manner.

' This improvement produces a bed bottom which is substantially free from any tendency to sag by long use and in which the two sides of the mattress'may be adjusted independently from time to time whereby a person lying or resting on one side of the bed and moving thereon will not tend .to displace, raise 'or otherwise disturb a person resting on the other side of the bed.

Further objects and improved features of construction will be apparent from the following description.

In the accompanying drawing forming part of this specification, Figure 1 is a plan viewof my improved bed bottom looking down upon the bottom of the bed, part of the fabric being broken away; and Fig. 2 is a section of Fig. 1 taken upon the line XX.

In the drawing A indicates suitable frame work of a bed bottom composed of a pair of side bars 2 and 3, and end bars 4 and 5,'said side bars as illustrated in Fig. 1 being com posed of tubes and the end bars of angle iron rods, although any suitable construction of frame work is contemplated within the scope of my invention, it being obvious that the sides may be of angle iron' construction as well as the ends.

B and G indicatetwo parallel sections of link fabric, lying substantially in the same plane, the ends of said sections being connected by their links and helical springs 7 to the end bar 5, and their opposite ends to angle iron draw bars 8 and 9, one bar being connected to each of said sections by means of a plurality of helical springs 10, connected by their ends to the links of the fabric and through openings 11 in the draw bars.

These draw bars are freely connected to the end 4 of the frame by means of bolts 12 fastened through one side of the end 4 and through a side 13 of either of the draw bars 8 and 9. The ends of the bolts passing through the side 13 of the draw bars are secured to nuts 14, one side of each of said nuts lying close to the horizontal side of 15 of the anchor member so as to prevent the nuts from turning. By turning the bolts by their heads 16, they are screwed into or out of the nuts and the tension of the link fabric thus adjusted longitudinally for the purpose of taking up any slack and holding the fabric under desired tension.

At each side of the frame A is a selvage strip 17, consisting of athin strip of mate'- rial, the ends of which are secured to the ends of the frame by helical tension springs 18. These springs. 18 support the selvage strip under tension to prevent the edge of each section of the fabric from sagging and becoming strained. The inner edges of the two selvage strips 18 are provided with perforations 19 through which the links of the fabric of each section'B and O are anchored or secure'd. The adjacent edges of the sections 18 and C of the fabric are likewise secured to a centrally disposed selvage strip 20, the ends of which are also secured to the ends of the frame by helical springs 21. These springs 21 support the centrally disposed selvage strip under tension to also prevent the inner edges of the link fabric from sagging. The links of the inner edges of the sections of the fabric are fastened to the intermediate selvage strip 20 through perforations 22. By placing this intermediate selvage strip between the sections of the link fabric independent longitudinal adjustment of the sections is provided, and two inde-,

pendently operating sections in the mattress are formed, so that a person resting on one side or one section does not in any way sag or influence the operation of the adjacent section.

Patented am 2o, ieic.

By using a flat thin-- piece of material as a selvage strip a vertical flexible support is produced having greater strength than a round wire made from the same amount of material and a lateral support is also obtained, which tends to hold the mat in better sha e.

Iii accordance with the patent statutes 1 have described the principles of operation of my invention together with the apparatus which I now consider to represent the best embodiment thereof but I desire to have it understood that the construction shown is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims. I

Having described my invention, what I claim as new and desire to protect by Letters Patent is 1. In a spring mattress, the combination with the main frame of a pairof independent spring mattress sections resiliently supported at their ends in the main frame and spaced apart, a selvage strip extending longitudinally and centrally between the mattress sections, means for resiliently connecting the ends of said strip in the main frame, and link connections between the adjacent side edges of said mattress sections and said strip.

2. In a spring mattress. the combination with the main frame, of a pair of independent spring mattress sections, means at the ends of sa1d sections for supporting the same in the main frame and spaced apart, means for adjusting the resiliency of said section supporting means, a plurality of selvage strips, one of said strips extending longitudinally and centrally between the mattress sectionsand the other of said strips extend- 

